They are allowing all existing accounts to upgrade 1 toon to Heroic which bumps you to 85 and gives a bunch of equipment. You have to do it by March 31st. All you have to do is log a toon into a server. You will get a message saying that you now have a Heroic upgrade available. Then log out and click the upgrade to heroic and pick an existing toon or make a new one and select heroic.
Just thought I would let you all know in case you don't get EQ emails.